Valkonen, Jari, and Eerik Mäkäräinen. “Symptom Expression and Accumulation of Potato Virus Y (PVYO) and Potato Leaf Roll Virus in Thirteen Potato Cultivars”. Agricultural and Food Science 2, no. 1 (January 1, 1993): 33–40. Accessed November 23, 2024. https://journal.fi/afs/article/view/72638.